JGL's rep echoes that sentiment, telling us, "They have met up a couple times, as they are discussing working together on a project, but the night that Us Weekly's source spotted them 'making out,' Joseph wasn't even in NYC."

This time last year, ScarJo and Gordon-Levitt were reportedly in discussions to star in Diablo Cody's undead flick, "Breathers: A Zombie's Lament."

Meanwhile, in more concrete make-out news, Johansson's ex-hubby, Ryan Reynolds, continues to spend quality time with Blake Lively. Paparazzi snapped her coming out of his Boston apartment a few days back, which reportedly makes her third visit in as many weeks.

A source tells the New York Daily News that the "Green Lantern" co-stars are getting "more serious," asserting, "[Ryan] really respects her."